34 C.F.R. § 303.435
(a) Qualifications and duties. Whenever a due process complaint is received under § 303.430(d), a due process hearing officer must be appointed to implement the complaint resolution process in this subpart. The person must—
(2) Perform the following duties:
(i)
(b) Definition of impartial.
(1) Impartial means that the due process hearing officer appointed to implement the due process hearing under this part—
(2) A person who otherwise qualifies under paragraph (b)(1) of this section is not an employee of an agency solely because the person is paid by the agency to implement the due process hearing procedures or mediation procedures under this part.
(Authority: 20 U.S.C. 1439(a)(1))